In early July, Rongsheng Petrochemical adjusted prices on selected polyester filament yarn (FDY) varieties, with cuts ranging from 100 to 200 yuan per ton. Key specifications include semi-dull FDY 30D/24F at 10,950 yuan/ton, 75/36 at 8,500, 150/96 at 8,300, 200/48 at 8,450, and 300/96 at 8,400. This is not a blanket price cut but a strategic adjustment targeting specific categories—signaling that inventory pressure is shifting from production to pricing in the polyester supply chain.
The Inventory Logic Behind the Price Cut
The price reduction focuses on FDY, covering both fine and coarse denier specs. Industry data shows that FDY sales-to-output ratios dropped to 60-70% in late June, down from over 80% in May. Inventory days rose from around 15 to over 20, approaching the industry warning line. This is not an isolated case but a common challenge for major polyester producers. The selective price cut reflects a cautious "price-for-volume" strategy—aiming to destock and free up cash without triggering a full-scale price war.
Sentiment quickly spreads across the polyester sector. Following the FDY price cut, polyester staple fiber (PSF) market sentiment also weakened. Although PSF and FDY serve different downstream applications—PSF is mainly used in nonwovens and fillings, while FDY is for weaving—they share the same raw material cost structure (PTA and MEG). Thus, FDY price cuts raise concerns about overall polyester supply-demand imbalance, dragging down PSF price expectations.
A Procurement Window for Weaving Mills
For weaving mills, this price cut means lower near-term FDY procurement costs. For instance, 150D/96F at 8,300 yuan/ton is about 3.5% lower than mid-June levels. A medium-sized mill consuming over 10 tons daily could save nearly 90,000 yuan per month on raw materials. However, caution is warranted: this may be just the start. If end-use garment orders remain weak during the traditional July-August slack season, FDY prices could fall further. Buyers should avoid bulk purchases and maintain a need-based procurement rhythm while monitoring cost support from PTA and MEG.
Another dimension is regional market reactions. Traders in major polyester hubs like Shaoxing and Xiaoshan report increased inquiries after the price cut, but actual transaction volumes have not picked up significantly. Downstream weaving mills are adopting a wait-and-see approach, looking for clearer bottom signals. This "buy on rising, not falling" mentality is typical during price downturns—the more prices drop, the more buyers hesitate, fearing they might catch a falling knife.
Deeper Implications for the Polyester Chain
Rongsheng's partial price cut is essentially a fine-tuning of profit distribution along the polyester chain. In the first half of 2025, profits were heavily concentrated in PX, while margins for PTA and polyester were squeezed to low levels. When a major polyester producer voluntarily cuts prices, it opens room for upstream PX to give back some margin. If PTA prices fail to move down in tandem, polyester producers' losses will widen. Whether this triggers a chain reaction depends on two variables: whether PX producers are willing to concede margin, and whether downstream demand can surprise on the upside in July-August.
From a longer-term perspective, overcapacity in the polyester industry remains unresolved. In 2025, new domestic polyester capacity is expected to exceed 5 million tons, while downstream demand growth has slowed to below 3%. Price competition will become the norm, forcing companies to seek premiums through differentiated products like recycled polyester and functional fibers. Rongsheng's decision to cut prices on standard FDY grades underscores that profit margins on commodity-grade products have already hit the floor.